Bought my mbp

Hey i just came back from the apple store and got my mbp, finally! My pc laptop died on me so its a big upgrade.

My questions are, when i first boot, do i plug it in or does it come charged?

My friend bought one and after first boot he re-installed leopard and then used the computer until it died, THEN charged it. Why would he do this and is it better for the battery to do this for the first time?

MacRumors attracts a broad audience
of both consumers and professionals interested in
the latest technologies and products. We also boast an active community focused on
purchasing decisions and technical aspects of the iPhone, iPod, iPad, and Mac platforms.